// 导出页面为PDF格式
import html2Canvas from "html2canvas";
import JsPDF from "jspdf";

export function getPdf(title, id) {
    alert('点击确定打印')
    html2Canvas(document.querySelector(`#${id}`), {
        allowTaint: true,
    }).then(function (canvas) {
        let contentWidth = canvas.width;
        let contentHeight = canvas.height;
        let pageHeight = (contentWidth / 592.28) * 841.89;
        let leftHeight = contentHeight;
        let position = 0;
        let imgWidth = 595.28;
        let imgHeight = (592.28 / contentWidth) * contentHeight;
        let pageData = canvas.toDataURL("image/jpeg", 1.0);
        let PDF = new JsPDF("", "pt", "a4");
        if (leftHeight < pageHeight) {
            PDF.addImage(pageData, "JPEG", 0, 0, imgWidth, imgHeight);
        } else {
            while (leftHeight > 0) {
                PDF.addImage(pageData, "JPEG", 0, position, imgWidth, imgHeight);
                leftHeight -= pageHeight;
                position -= 841.89;
                if (leftHeight > 0) {
                    PDF.addPage();
                }
            }
        }
        PDF.save(title + ".pdf");
    });
}